$def with (name,file_list)
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form id="form1" enctype="multipart/form-data" method="post" action="/upload">
    <div class="row">
        <label for="fileToUpload">Select a File to Upload</label>
        <input type="file" name="upload_file" id="fileToUpload" />
    </div>
    <div id="fileName"></div>
    <div id="fileSize"></div>
    <div id="fileType"></div>
    <div class="row">
        <input type="submit" value="提交"></input>
    </div>
    <div id="progressNumber"></div>
</form>
</body>
</html>